I'm traveling a lot with my Bebop quad-copter and I never know where to store the props without bending them during transport.
Well not any more. The box can carry 4 props. If you want to bring spare props, print a second one.
Please note that this is for the Bebop ONE only. It seems that if you print it with a scale of 1.1 it will accommodate the v2 props (thank's to LeLoki). But I didn't try it myself.